:root{color-scheme:light;--night: 0;--bg: #e9f6f5;--surface: #ffffff;--text: #1d3b45;--muted: #4f6a72;--accent: #b4561b;--accent-text: #ffffff;--btn: #ffffff;--btn-border: #c7e1e0;--shadow: 0 2px 0 rgb(29 59 69 / .12);--water: #8adbdf;--water-deep: #4fb0c6;--wave: #ffffff;--water-dot: rgb(255 255 255 / .35);--foam: rgb(255 255 255 / .7);--glow: rgb(255 255 255 / 0);--sand: #f7e2a8;--sand-edge: #c99a5b;--grass: #8fcf6a;--grass-full: #5dbb4a;--grass-dark: #3f9a45;--island-over: #f08a5d;--sign: #ffffff;--sign-edge: #9a7048;--island-text: #2d2013;--text-glow: transparent;--trunk: #8a5a32;--roof: #d9a441;--full: #ffcf3f;--plank: #c68a4f;--plank-dark: #7a4f2a;--rope: #5e3b1e;--bridge-preview: #fff1c9;--rock: #98a2ab;--rock-dark: #5f6973;--rock-light: #d7dde2;--focus: #1d5fd1;--hint: #ffe066;--mistake: #d93b20;--sail: #ffffff;--sail-stripe: #e8573c;--hull: #b5713b;--bird: #ffffff;--sun: rgb(255 214 90 / .9);--radius: 16px;font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif}@media(prefers-color-scheme:dark){:root:not([data-theme=light]){color-scheme:dark;--night: 1;--bg: #0b1426;--surface: #15233d;--text: #e6eefb;--muted: #a9b8cf;--btn: #1b2b49;--btn-border: #2b3f63;--shadow: 0 2px 0 rgb(0 0 0 / .35);--water: #1a3766;--water-deep: #0b1b38;--wave: #9fc2ff;--water-dot: rgb(200 220 255 / .14);--foam: rgb(200 225 255 / .35);--glow: rgb(210 225 255 / .28);--sand: #b9a577;--sand-edge: #6f6044;--grass: #4f8a4b;--grass-full: #3fa65a;--grass-dark: #2f6a3a;--island-over: #c9653f;--sign: #1b2c4d;--sign-edge: #e8d9a8;--island-text: #fff6d6;--text-glow: #ffe9a8;--trunk: #6b4a2c;--roof: #a98543;--full: #ffd84d;--plank: #a9774a;--plank-dark: #4a3019;--rope: #d9c08f;--bridge-preview: #fff1c9;--rock: #6f7b88;--rock-dark: #3c4550;--rock-light: #a9b5c2;--focus: #8ab4ff;--hint: #ffd84d;--mistake: #ff6b4f;--sail: #e9eef8;--sail-stripe: #ff7a5c;--hull: #8c5a31;--bird: #dfe8ff;--sun: rgb(230 238 255 / .75)}}:root[data-theme=dark]{color-scheme:dark;--night: 1;--bg: #0b1426;--surface: #15233d;--text: #e6eefb;--muted: #a9b8cf;--btn: #1b2b49;--btn-border: #2b3f63;--shadow: 0 2px 0 rgb(0 0 0 / .35);--water: #1a3766;--water-deep: #0b1b38;--wave: #9fc2ff;--water-dot: rgb(200 220 255 / .14);--foam: rgb(200 225 255 / .35);--glow: rgb(210 225 255 / .28);--sand: #b9a577;--sand-edge: #6f6044;--grass: #4f8a4b;--grass-full: #3fa65a;--grass-dark: #2f6a3a;--island-over: #c9653f;--sign: #1b2c4d;--sign-edge: #e8d9a8;--island-text: #fff6d6;--text-glow: #ffe9a8;--trunk: #6b4a2c;--roof: #a98543;--full: #ffd84d;--plank: #a9774a;--plank-dark: #4a3019;--rope: #d9c08f;--bridge-preview: #fff1c9;--rock: #6f7b88;--rock-dark: #3c4550;--rock-light: #a9b5c2;--focus: #8ab4ff;--hint: #ffd84d;--mistake: #ff6b4f;--sail: #e9eef8;--sail-stripe: #ff7a5c;--hull: #8c5a31;--bird: #dfe8ff;--sun: rgb(230 238 255 / .75)}*{box-sizing:border-box}html,body{margin:0;min-height:100%;background:var(--bg);color:var(--text)}body{min-height:100dvh;-webkit-tap-highlight-color:transparent}#app{max-width:560px;margin:0 auto;padding:max(12px,env(safe-area-inset-top)) 16px max(16px,env(safe-area-inset-bottom))}h1,h2{margin:0}.screen{display:flex;flex-direction:column;gap:12px}.home{align-items:center;text-align:center;padding-top:8vh}.logo svg{width:140px;height:70px}.logo-island{fill:var(--sand);stroke:var(--sand-edge);stroke-width:2.5}.logo-bridge{stroke:var(--plank);stroke-width:4;stroke-linecap:round}.title{font-size:clamp(2.4rem,10vw,3.4rem);letter-spacing:-.02em}.tagline{margin:0 0 16px;color:var(--muted)}.menu{display:flex;flex-direction:column;gap:12px;width:min(100%,320px)}.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;min-height:44px;padding:8px 14px;border:2px solid var(--btn-border);border-radius:999px;background:var(--btn);color:var(--text);font:inherit;font-weight:600;box-shadow:var(--shadow);cursor:pointer;touch-action:manipulation}.btn:hover:not(:disabled){filter:brightness(.97)}.btn:active:not(:disabled){transform:translateY(1px);box-shadow:none}.btn:disabled{opacity:.45;cursor:default}.btn:focus-visible,.board:focus-visible{outline:3px solid var(--focus);outline-offset:2px}.btn.primary{background:var(--accent);border-color:var(--accent);color:var(--accent-text)}.btn.big{flex-direction:column;gap:2px;min-height:56px;font-size:1.1rem;border-radius:var(--radius)}.btn.big small{font-size:.8rem;font-weight:500}.btn.icon{width:44px;padding:0}.btn svg{width:20px;height:20px;fill:none;stroke:currentColor;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round}.topbar{display:grid;grid-template-columns:44px 1fr auto;align-items:center;gap:8px}.topbar-title{font-size:1.15rem;text-align:center}.timer{min-width:44px;font-variant-numeric:tabular-nums;color:var(--muted);text-align:right}.board-frame{width:100%;max-height:70dvh;margin:0 auto;border-radius:var(--radius);background:radial-gradient(120% 100% at 30% 20%,var(--water) 0%,var(--water-deep) 100%);overflow:hidden}.board-frame.placeholder{display:grid;place-items:center;aspect-ratio:1;color:var(--accent-text);font-weight:600}.board{display:block;width:100%;height:100%;touch-action:none;user-select:none;-webkit-user-select:none;cursor:pointer}.status{min-height:2.6em;margin:0;color:var(--muted);font-size:.95rem;text-align:center}.toolbar{display:flex;justify-content:center;flex-wrap:wrap;gap:8px}.dialog{width:min(92vw,420px);border:0;border-radius:var(--radius);padding:20px;background:var(--surface);color:var(--text);box-shadow:0 20px 60px #0000004d}.dialog::backdrop{background:#0a1e2873}.dialog h2{margin-bottom:12px;text-align:center}.dialog-actions{display:flex;justify-content:center;gap:8px;margin-top:16px}.rules{margin:0 0 12px;padding-left:1.2em;line-height:1.45}.rules li+li{margin-top:6px}.muted{color:var(--muted);font-size:.92rem;line-height:1.45}.stats{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;margin:0;text-align:center}.stats dt{color:var(--muted);font-size:.8rem}.stats dd{margin:2px 0 0;font-size:1.4rem;font-weight:700;font-variant-numeric:tabular-nums}.badge{margin:0 0 12px;color:var(--accent);font-weight:700;text-align:center}@media(prefers-reduced-motion:reduce){*{transition:none!important;animation:none!important}}.menu-row{display:grid;grid-template-columns:1fr 1fr;gap:12px}.stats.four{grid-template-columns:repeat(4,1fr)}.stats.four dd{margin:0}.stats.four dt{margin-top:2px;line-height:1.2}.stats-panel h3{margin:16px 0 8px;font-size:.95rem;text-align:center}.histogram{display:grid;gap:4px;margin:0;padding:0;list-style:none}.histogram li{display:grid;grid-template-columns:5.5em 1fr;align-items:center;gap:8px;font-size:.85rem}.hist-label{color:var(--muted);text-align:right;font-variant-numeric:tabular-nums}.hist-bar{min-width:1.6em;padding:2px 6px;border-radius:6px;background:var(--water-deep);color:#fff;font-weight:700;text-align:right}.share-preview{margin:16px 0 0;padding:12px;border-radius:12px;background:var(--bg);font:inherit;font-size:.95rem;line-height:1.5;white-space:pre-wrap;text-align:center;user-select:text}.dialog hr{margin:8px 0 4px;border:0;border-top:1px solid var(--btn-border)}.dialog .status{min-height:1.4em;margin-top:8px}.countdown{margin:16px 0 0;color:var(--muted);text-align:center}.countdown strong{color:var(--text);font-size:1.2rem;font-variant-numeric:tabular-nums}.dialog{max-height:92dvh;overflow-y:auto}.menu-row{grid-template-columns:repeat(auto-fit,minmax(90px,1fr))}.profile-section{display:grid;justify-items:start;gap:8px;margin-top:16px}.profile-section h3{margin:0;font-size:1rem}.profile-section p{margin:0}.recovery-code{padding:8px 12px;border-radius:10px;background:var(--bg);font-family:ui-monospace,Cascadia Mono,Menlo,monospace;font-size:1.15rem;font-weight:700;letter-spacing:.03em;user-select:all}.field{display:grid;gap:4px;width:100%;font-size:.9rem;color:var(--muted)}.field input{min-height:44px;padding:8px 12px;border:2px solid var(--btn-border);border-radius:10px;background:var(--bg);color:var(--text);font:inherit;font-family:ui-monospace,Cascadia Mono,Menlo,monospace}.field input:focus-visible{outline:3px solid var(--focus);outline-offset:1px}.btn.danger{background:var(--mistake);border-color:var(--mistake);color:#fff}.topbar{grid-template-columns:44px 1fr auto 44px}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}.skip-hint{margin:-4px 0 0;color:var(--muted);font-size:.9rem;text-align:center;animation:pulse-text 1.2s ease-in-out infinite alternate}@keyframes pulse-text{0%{opacity:.5}to{opacity:1}}.board-frame{box-shadow:0 6px #00000014,inset 0 0 0 3px #ffffff40}.choice{display:grid;gap:6px;margin:0 0 14px;padding:0;border:0}.choice legend{margin-bottom:6px;font-weight:700}.choice label{display:flex;align-items:center;gap:10px;min-height:44px;padding:0 12px;border:2px solid var(--btn-border);border-radius:12px;cursor:pointer}.choice label:has(input:checked){border-color:var(--accent)}.choice input{width:20px;height:20px;margin:0;accent-color:var(--accent)}.btn,.choice label{transition:transform .08s ease,background-color .15s ease,border-color .15s ease}.btn.primary{box-shadow:0 3px #0000002e}.update-banner{position:fixed;left:50%;bottom:max(16px,env(safe-area-inset-bottom));z-index:10;display:flex;align-items:center;gap:12px;width:min(calc(100% - 32px),480px);padding:10px 10px 10px 16px;border-radius:var(--radius);background:var(--surface);color:var(--text);box-shadow:0 10px 30px #00000040;transform:translate(-50%)}.update-banner span{flex:1}.site-footer{margin-top:32px;padding:16px 0 8px;border-top:1px solid var(--btn-border)}.site-footer nav{display:flex;flex-wrap:wrap;justify-content:center;gap:4px 8px}.site-footer a{display:inline-flex;align-items:center;min-height:44px;padding:0 8px;color:var(--muted);font-size:.92rem;text-decoration:underline;text-underline-offset:3px}.site-footer a:hover,.site-footer a:focus-visible{color:var(--text)}.home .site-footer{width:100%}.page-topbar{grid-template-columns:44px 1fr 44px}.prose{line-height:1.6}.prose h2{margin:24px 0 8px;font-size:1.15rem}.prose p,.prose ul{margin:0 0 12px}.prose ul{padding-left:1.2em}.prose li+li{margin-top:6px}.prose .lead{font-size:1.05rem}.ad-slot{position:relative;display:grid;place-items:center;width:100%;margin:8px 0 0;border-radius:12px;background:#7f7f7f14;overflow:hidden}.ad-label{position:absolute;top:4px;left:8px;color:var(--muted);font-size:.7rem;letter-spacing:.04em;text-transform:uppercase}.ad-slot ins{width:100%}.dialog .ad-slot{margin:16px 0 4px}